Should I Make a Move?

I'm inlove with this guy for the past year. I haven't made a move cause I was afraid we won't be friends anymore. Thing is we were always friends. And I get hints that he loves me back. He would talk to me on msn, and he is offline. He would stay longer at work to talk to me for hours. We would talk online until early morning. When I mention I have a girlfriend he always seem sad. And one time when someone mentioned that he was spending time with a girl, he'd tell me it wasn't true. Also, I always see him look at me when I turn around and he 's there. Problem is he is really shy. When I talk to him and he talks to me, he's always blushing, and puts his head down all the time. My heart tells me that he loves me cause I could feel it, but my head tells me he doesn't cause he also loves his best friend who's a girl, who now has a boyfriend. And when his friend just had a boyfriend, he starts hanging with me more. And one time we were sitting down at work, and I felt soo strong that he loves me, and I wanted to make a move and kiss him, but at the same time my head was telling me not to make a move, cause I wasn't sure if he still loves her (his best friend). But thing is I can really feel that hel oves me (I have a really strong feeling), but my head is telling me otherwise. Is it just cause I'm afraid on what the outcome will be? I really love him and I can strongly feel from him that he loves me back. My heart tells me to make a move(cause I have a very strong feeling), but my head tells me no (cause we might not be friends anymore or I'm just wrong and he does not love me at all). A part of me wants to make a move, and another part does not. So the question is Should I make a move?